How to simulate the atmega328 MCU power consumption using Simulink in Matlab?, are there other simulation softwares can be used for MCUs power simulations?
I think, that use of Simulink is not a good Idea due to absence of thermal data in standard blockset and high-deviation of any constructed analytic power consumption model from obtained by real thermostat-based measurements.
You may focused onto two things: 1) finding of adequate IBIS-like model for this MCU, which contains numeric data measured from real MCU package under different conditions; 2) to compose a simplified thermal model using data-sheet parameters (thermal resistances) and experimental results based on VI-measurements simultaneously with thermostat data. Look for model here:
Note, that power consumption significantly depends on software configuration (amount of active MCU peripheral and mainly of selected System Clock Frequency). That's why simulation must be performed in all MCU modes.